static void
gimp_ruler_update_position (GimpRuler *ruler,
gdouble x,
gdouble y)
{
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gdouble lower;
gdouble upper;
gtk_widget_get_allocation (GTK_WIDGET (ruler), &allocation);
gimp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
gimp_ruler_set_position (ruler,
lower +
(upper - lower) * x / allocation.width);
}
else
{
gimp_ruler_set_position (ruler,
lower +
(upper - lower) * y / allocation.height);
}
}
static GdkRectangle
gimp_ruler_get_pos_rect (GimpRuler *ruler,
gdouble position)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyleContext *context = gtk_widget_get_style_context (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
GtkBorder border;
gint width, height;
gdouble upper, lower;
gdouble increment;
GdkRectangle rect = { 0, };
if (! gtk_widget_is_drawable (widget))
return rect;
gtk_widget_get_allocation (widget, &allocation);
gtk_style_context_get_border (context, 0, &border);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - (border.top + border.bottom);
rect.width = height / 2 + 2;
rect.width |= 1; /* make sure it's odd */
rect.height = rect.width / 2 + 1;
}
else
{
width = allocation.width - (border.left + border.right);
height = allocation.height;
rect.height = width / 2 + 2;
rect.height |= 1; /* make sure it's odd */
rect.width = rect.height / 2 + 1;
}
gimp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
increment = (gdouble) width / (upper - lower);
rect.x = ROUND ((position - lower) * increment) + (border.left + border.right - rect.width) / 2 - 1;
rect.y = (height + rect.height) / 2 + border.top;
}
else
{
increment = (gdouble) height / (upper - lower);
rect.x = (width + rect.width) / 2 + border.left;
rect.y = ROUND ((position - lower) * increment) + (border.top + border.bottom - rect.height) / 2 - 1;
}
return rect;
}
static void
gimp_ruler_draw_ticks (GimpRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyle *style = gtk_widget_get_style (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkStateType state = gtk_widget_get_state (widget);
GtkAllocation allocation;
cairo_t *cr;
gint i;
gint width, height;
gint xthickness;
gint ythickness;
gint length, ideal_length;
gdouble lower, upper; /* Upper and lower limits, in ruler units */
gdouble increment; /* Number of pixels per unit */
gint scale; /* Number of units per major unit */
gdouble start, end, cur;
gchar unit_str[32];
gint digit_height;
gint digit_offset;
gint text_size;
gint pos;
gdouble max_size;
GimpUnit unit;
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
xthickness = style->xthickness;
ythickness = style->ythickness;
layout = gimp_ruler_get_layout (widget, "0123456789");
pango_layout_get_extents (layout, &ink_rect, &logical_rect);
digit_height = PANGO_PIXELS (ink_rect.height) + 2;
digit_offset = ink_rect.y;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
}
else
{
width = allocation.height;
height = allocation.width - ythickness * 2;
}
cr = cairo_create (priv->backing_store);
gdk_cairo_set_source_color (cr, &style->bg[state]);
#if 0
gtk_paint_box (style, priv->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget,
priv->orientation == GTK_ORIENTATION_HORIZONTAL ?
"hruler" : "vruler",
0, 0,
allocation.width, allocation.height);
#else
cairo_paint (cr);
#endif
gdk_cairo_set_source_color (cr, &style->fg[state]);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
xthickness,
height + ythickness,
allocation.width - 2 * xthickness,
1);
}
else
{
cairo_rectangle (cr,
height + xthickness,
ythickness,
1,
allocation.height - 2 * ythickness);
}
gimp_ruler_get_range (ruler, &lower, &upper, &max_size);
if ((upper - lower) == 0)
goto out;
increment = (gdouble) width / (upper - lower);
/* determine the scale
* use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*
* We calculate the text size as for the vruler instead of
* actually measuring the text width, so that the result for the
* scale looks consistent with an accompanying vruler.
*/
scale = ceil (max_size);
g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
text_size = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_size)
break;
if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;
unit = gimp_ruler_get_unit (ruler);
/* drawing starts here */
length = 0;
for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
{
gdouble subd_incr;
/* hack to get proper subdivisions at full pixels */
if (unit == GIMP_UNIT_PIXEL && scale == 1 && i == 1)
subd_incr = 1.0;
else
subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
(gdouble) ruler_metric.subdivide[i]);
if (subd_incr * fabs (increment) <= MINIMUM_INCR)
continue;
/* don't subdivide pixels */
if (unit == GIMP_UNIT_PIXEL && subd_incr < 1.0)
continue;
/* Calculate the length of the tickmarks. Make sure that
* this length increases for each set of ticks
*/
ideal_length = height / (i + 1) - 1;
if (ideal_length > ++length)
length = ideal_length;
if (lower < upper)
{
start = floor (lower / subd_incr) * subd_incr;
end = ceil (upper / subd_incr) * subd_incr;
}
else
{
start = floor (upper / subd_incr) * subd_incr;
end = ceil (lower / subd_incr) * subd_incr;
}
for (cur = start; cur <= end; cur += subd_incr)
{
pos = ROUND ((cur - lower) * increment);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
pos, height + ythickness - length,
1, length);
}
else
{
cairo_rectangle (cr,
height + xthickness - length, pos,
length, 1);
}
/* draw label */
if (i == 0)
{
g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
pango_layout_set_text (layout, unit_str, -1);
pango_layout_get_extents (layout, &logical_rect, NULL);
#if 0
gtk_paint_layout (style,
priv->backing_store,
state,
FALSE,
NULL,
widget,
"hruler",
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
#else
cairo_move_to (cr,
pos + 2,
ythickness + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
#endif
}
else
{
gint j;
for (j = 0; j < (int) strlen (unit_str); j++)
{
pango_layout_set_text (layout, unit_str + j, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
#if 0
gtk_paint_layout (style,
priv->backing_store,
state,
FALSE,
NULL,
widget,
"vruler",
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
#else
cairo_move_to (cr,
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset));
pango_cairo_show_layout (cr, layout);
#endif
}
}
}
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
}
static void
gimp_ruler_draw_pos (GimpRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyle *style = gtk_widget_get_style (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkStateType state = gtk_widget_get_state (widget);
GtkAllocation allocation;
gint x, y;
gint width, height;
gint bs_width, bs_height;
gint xthickness;
gint ythickness;
if (! gtk_widget_is_drawable (widget))
return;
gtk_widget_get_allocation (widget, &allocation);
xthickness = style->xthickness;
ythickness = style->ythickness;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
bs_width = height / 2 + 2;
bs_width |= 1; /* make sure it's odd */
bs_height = bs_width / 2 + 1;
}
else
{
width = allocation.width - xthickness * 2;
height = allocation.height;
bs_height = width / 2 + 2;
bs_height |= 1; /* make sure it's odd */
bs_width = bs_height / 2 + 1;
}
if ((bs_width > 0) && (bs_height > 0))
{
cairo_t *cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdouble lower;
gdouble upper;
gdouble position;
gdouble increment;
cairo_rectangle (cr,
allocation.x, allocation.y,
allocation.width, allocation.height);
cairo_clip (cr);
cairo_translate (cr, allocation.x, allocation.y);
/* If a backing store exists, restore the ruler */
if (priv->backing_store)
{
cairo_set_source_surface (cr, priv->backing_store, 0, 0);
cairo_rectangle (cr, priv->xsrc, priv->ysrc, bs_width, bs_height);
cairo_fill (cr);
}
position = gimp_ruler_get_position (ruler);
gimp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
increment = (gdouble) width / (upper - lower);
x = ROUND ((position - lower) * increment) + (xthickness - bs_width) / 2 - 1;
y = (height + bs_height) / 2 + ythickness;
}
else
{
increment = (gdouble) height / (upper - lower);
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((position - lower) * increment) + (ythickness - bs_height) / 2 - 1;
}
gdk_cairo_set_source_color (cr, &style->fg[state]);
cairo_move_to (cr, x, y);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_line_to (cr, x + bs_width / 2.0, y + bs_height);
cairo_line_to (cr, x + bs_width, y);
}
else
{
cairo_line_to (cr, x + bs_width, y + bs_height / 2.0);
cairo_line_to (cr, x, y + bs_height);
}
cairo_fill (cr);
cairo_destroy (cr);
priv->xsrc = x;
priv->ysrc = y;
}
}
static GdkRectangle
gimp_ruler_get_pos_rect (GimpRuler *ruler,
gdouble position)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkStyle *style = gtk_widget_get_style (widget);
GimpRulerPrivate *priv = GIMP_RULER_GET_PRIVATE (ruler);
GtkAllocation allocation;
gint width, height;
gint xthickness;
gint ythickness;
gdouble upper, lower;
gdouble increment;
GdkRectangle rect = { 0, };
if (! gtk_widget_is_drawable (widget))
return rect;
gtk_widget_get_allocation (widget, &allocation);
xthickness = style->xthickness;
ythickness = style->ythickness;
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = allocation.width;
height = allocation.height - ythickness * 2;
rect.width = height / 2 + 2;
rect.width |= 1; /* make sure it's odd */
rect.height = rect.width / 2 + 1;
}
else
{
width = allocation.width - xthickness * 2;
height = allocation.height;
rect.height = width / 2 + 2;
rect.height |= 1; /* make sure it's odd */
rect.width = rect.height / 2 + 1;
}
gimp_ruler_get_range (ruler, &lower, &upper, NULL);
if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
{
increment = (gdouble) width / (upper - lower);
rect.x = ROUND ((position - lower) * increment) + (xthickness - rect.width) / 2 - 1;
rect.y = (height + rect.height) / 2 + ythickness;
}
else
{
increment = (gdouble) height / (upper - lower);
rect.x = (width + rect.width) / 2 + xthickness;
rect.y = ROUND ((position - lower) * increment) + (ythickness - rect.height) / 2 - 1;
}
rect.x += allocation.x;
rect.y += allocation.y;
return rect;
}
